Related Experiment Video

Updated: Jun 28, 2026

Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells
11:42

Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells

Published on: April 7, 2017

Genetic and molecular alterations in rhabdomyosarcoma: mRNA overexpression of MCL1 and MAP2K4 genes

L Pazzaglia1, A Chiechi, A Conti

  • 1Laboratory of Oncologic Research, Rizzoli Orthopaedic Institute, Bologna, Italy. laura.pazzaglia@ior.it

Histology and Histopathology
|November 18, 2008
PubMed

Insights

This study investigated genetic changes in childhood rhabdomyosarcoma, finding chromosome alterations and overexpression of MCL1 and MAP2K4 genes involved in cell survival signaling pathways.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Rhabdomyosarcoma is a common pediatric soft tissue sarcoma.
  • It is classified into embryonal, alveolar, and pleomorphic subtypes based on histology.
  • Understanding its genetic basis is crucial for developing targeted therapies.

Purpose of the Study:

  • To explore genetic alterations in rhabdomyosarcoma tumorigenesis.
  • To assess mRNA gene expression of cell survival signaling pathways.
  • To identify potential therapeutic targets in rhabdomyosarcoma.

Main Methods:

  • Array-based comparative genomic hybridization (aCGH) was used for genetic analysis.
  • Real-Time PCR (RT-PCR) was employed to quantify mRNA gene expression.
  • Fourteen primary human rhabdomyosarcoma samples were analyzed.

Main Results:

  • All samples exhibited chromosomal copy number alterations, including gains and losses.
  • Specific chromosomal regions harboring cancer progression genes were affected.
  • Overexpression of MCL1 and MAP2K4 genes, crucial for cell viability, was observed in most cases.

Conclusions:

  • Rhabdomyosarcoma development involves multiple genetic alterations.
  • MAP2K4 and MCL1 gene overexpression suggests their role in rhabdomyosarcoma pathogenesis.
  • These findings highlight potential targets for future rhabdomyosarcoma treatments.

Related Concept Videos

Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The Retinoblastoma Gene01:20

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
MAPK Signaling Cascades01:07

MAPK Signaling Cascades

Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
Induced Pluripotent Stem Cells01:06

Induced Pluripotent Stem Cells

Stem cells are undifferentiated cells that divide and produce different cell types. Ordinarily, cells that have differentiated into a specific cell type are terminally differentiated; however, scientists have found a way to reprogram these mature cells so that they dedifferentiate and return to an unspecialized, proliferative state. These cells are pluripotent like embryonic stem cells—able to produce all cell types—and are called induced pluripotent stem cells (iPSCs).
Somatic cells are...
The Ras Gene02:38

The Ras Gene

The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a superfamily...